Network Working Group T. King Internet-Draft D. Kopp Intended status: Standards Track DE-CIX Expires: June 16, 2016 A. Lambrianidis AMS-IX A. Fenioux France-IX December 14, 2015 Signaling RPKI Validation Results from a Route-Server to Peers draft-kklf-sidr-route-server-rpki-light-00 Abstract This document defines the usage of the BGP Prefix Origin Validation State Extended Community [I-D.ietf-sidr-origin-validation-signaling] to signal RPKI validation results from a route-server to its peers. Upon reception of RPKI validation results peers can use this information in their local routing decision process. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" are to be interpreted as described in [RFC2119] only when they appear in all upper case. They may also appear in lower or mixed case as English words, without normative meaning. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on June 16, 2016. King, et al. Expires June 16, 2016 [Page 1] Internet-DraftSignaling RPKI Validation Results from a RoutDecember 2015 Copyright Notice Copyright (c) 2015 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Signaling RPKI Validation Results from a Route-Server to Peers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Operational Recommendations . . . . . . . . . . . . . . . . . 3 3.1. Local Routing Decision Process . . . . . . . . . . . . . 3 3.2. Route-Server Receiving the BGP Prefix Origin Validation State Extended Community . . . . . . . . . . . . . . . . 3 3.3. Error Handling at Peers . . . . . . . . . . . . . . . . . 4 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4 5. Security Considerations . . . . . . . . . . . . . . . . . . . 4 6. References . . . . . . . . . . . . . . . . . . . . . . . . . 4 6.1. Normative References . . . . . . . . . . . . . . . . . . 4 6.2. Informative References . . . . . . . . . . . . . . . . . 5 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 5 1. Introduction RPKI-based route origin validation [RFC6480] can be a significant operational burden for BGP peers to implement and adopt. In order to boost acceptance and usage of RPKI and ultimately increase the security of the Internet routing system, IXPs may provide RPKI-based route origin validation at the route-server [I-D.ietf-idr-ix-bgp-route-server]. The result of this route origin validation is signaled to peers by using the BGP Prefix Origin Validation State Extended Community as introduced in [I-D.ietf-sidr-origin-validation-signaling]. Peers receiving the route origin validation result from the route- server(s) can use this information in their local routing decision process for acceptance, rejection, preference, or other traffic engineering purposes of a particular route. King, et al. Expires June 16, 2016 [Page 2] Internet-DraftSignaling RPKI Validation Results from a RoutDecember 2015 2. Signaling RPKI Validation Results from a Route-Server to Peers The BGP Prefix Origin Validation State Extended Community (as defined in [I-D.ietf-sidr-origin-validation-signaling]) is utilized for signaling RPKI validation result from a route-server to peers. [I-D.ietf-sidr-origin-validation-signaling] proposes an encoding of the RPKI validation result [RFC6811] as follows: +-------+-----------+ | Value | Meaning | +-------+-----------+ | 0 | Valid | | 1 | Not found | | 2 | Invalid | +-------+-----------+ Table 1 This encoding is re-used. Route-servers providing RPKI-based route origin validation set the validation state according to the RPKI validation result (see [I-D.ietf-sidr-rpki-validation-reconsidered]). 3. Operational Recommendations 3.1. Local Routing Decision Process A peer receiving an RPKI validation result from the route server MAY use the information in its own local routing decision process. The local routing decision process SHOULD apply to the rules as described in section 5 [RFC6811]. A peer receiving an RPKI validation result from the route server MAY redistribute this information within its own AS. 3.2. Route-Server Receiving the BGP Prefix Origin Validation State Extended Community An IXP route-server receiving routes from its peers containing the BGP Prefix Origin Validation State Extended Community MUST remove the extended community before the route is re-distributed to its peers. This is required regardless of whether the route-server is executing RPKI origin validation or not. Failure to do so would allow opportunistic peers to advertise routes tagged with arbitrary RPKI validation results via a route-server, influencing maliciously the decision process of other route-server peers. King, et al. Expires June 16, 2016 [Page 3] Internet-DraftSignaling RPKI Validation Results from a RoutDecember 2015 3.3. Error Handling at Peers A route sent by a route-server SHOULD only contain none or one BGP Prefix Origin Validation State Extended Community. A peer receiving a route from a route-server containing more than one BGP Prefix Origin Validation State Extended Community SHOULD only consider the largest value (as described in Table 1) in the validation result field and disregard the other values. Values larger than two in the validation result field MUST be disregarded. 4. IANA Considerations None. 5. Security Considerations A route-server could be misused to spread malicious RPKI validation results. However, peers have to trust the route-server anyway as it collects and redistributes BGP routing information to other peers. The introduction of a mechanisms described in this document does not pose a new class of attack vectors to the relationship between route- servers and peers. 6. References 6.1. Normative References [I-D.ietf-sidr-rpki-validation-reconsidered] Huston, G., Michaelson, G., Martinez, C., Bruijnzeels, T., Newton, A., and A. Aina, "RPKI Validation Reconsidered", draft-ietf-sidr-rpki-validation-reconsidered-02 (work in progress), October 2015. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/ RFC2119, March 1997, . [RFC4360] Sangli, S., Tappan, D., and Y. Rekhter, "BGP Extended Communities Attribute", RFC 4360, DOI 10.17487/RFC4360, February 2006, . [RFC6811] Mohapatra, P., Scudder, J., Ward, D., Bush, R., and R. Austein, "BGP Prefix Origin Validation", RFC 6811, DOI 10.17487/RFC6811, January 2013, . King, et al. Expires June 16, 2016 [Page 4] Internet-DraftSignaling RPKI Validation Results from a RoutDecember 2015 6.2. Informative References [I-D.ietf-idr-ix-bgp-route-server] Jasinska, E., Hilliard, N., Raszuk, R., and N. Bakker, "Internet Exchange BGP Route Server", draft-ietf-idr-ix- bgp-route-server-09 (work in progress), October 2015. [I-D.ietf-sidr-origin-validation-signaling] Mohapatra, P., Patel, K., Scudder, J., Ward, D., and R. Bush, "BGP Prefix Origin Validation State Extended Community", draft-ietf-sidr-origin-validation-signaling-07 (work in progress), November 2015. [RFC6480] Lepinski, M. and S. Kent, "An Infrastructure to Support Secure Internet Routing", RFC 6480, DOI 10.17487/RFC6480, February 2012, . Authors' Addresses Thomas King DE-CIX Management GmbH Lichtstrasse 43i Cologne 50825 DE Email: thomas.king@de-cix.net Daniel Kopp DE-CIX Management GmbH Lichtstrasse 43i Cologne 50825 DE Email: daniel.kopp@de-cix.net Aristidis Lambrianidis Amsterdam Internet Exchange Frederiksplein 42 Amsterdam 1017 XN NL Email: aristidis.lambrianidis@ams-ix.net King, et al. Expires June 16, 2016 [Page 5] Internet-DraftSignaling RPKI Validation Results from a RoutDecember 2015 Arnaud Fenioux France-IX 88 Avenue Des Ternes Paris 75017 FR Email: afenioux@franceix.net King, et al. Expires June 16, 2016 [Page 6]